{"id":52355,"date":"2019-11-06T00:00:00","date_gmt":"2019-11-05T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/uyazvimosti-v-cpio-i-libarchive"},"modified":"2020-02-18T14:00:03","modified_gmt":"2020-02-18T11:00:03","slug":"uyazvimosti-v-cpio-i-libarchive","status":"publish","type":"post","link":"https:\/\/prohoster.info\/pt\/blog\/news\/uyazvimosti-v-cpio-i-libarchive","title":{"rendered":"Vulnerabilidades no cpio e libarchive","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Ap\u00f3s quatro anos desde o \u00faltimo lan\u00e7amento <noindex><a rel=\"nofollow\" href=\"https:\/\/www.mail-archive.com\/info-gnu@gnu.org\/msg02668.html\">foi publicado<\/a><\/noindex> o lan\u00e7amento da ferramenta de arquivamento de arquivos cpio 2.13, utilizada em pacotes RPM e no initramfs. Na nova vers\u00e3o, tr\u00eas vulnerabilidades foram corrigidas:<\/p>\n<ul>\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.suse.com\/show_bug.cgi?id=CVE-2015-1197\">CVE-2015-1197<\/a><\/noindex> \u2014 permite sobrescrever arquivos fora do diret\u00f3rio que o arquivo compactado se expande.\n<li class=\"l\">  <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.suse.com\/show_bug.cgi?id=CVE-2016-2037\">CVE-2016-2037<\/a><\/noindex> \u2014 resulta em grava\u00e7\u00e3o em uma \u00e1rea fora do buffer designado ao processar arquivos cpio especialmente formatados;\n<li class=\"l\"> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.redhat.com\/show_bug.cgi?id=CVE-2019-14866\">CVE-2019-14866<\/a><\/noindex>) \u2014 devido \u00e0 verifica\u00e7\u00e3o insuficiente do cabe\u00e7alho do arquivo TAR, permite, ao criar um arquivo no formato TAR a partir de uma lista de arquivos, no caso de haver na lista um arquivo tar muito grande especialmente formatado, gerar um arquivo resultante que inclui arquivos descompactados do arquivo tar adicionado com permiss\u00f5es de acesso incorretas.\n<p>    tar cf suffix.tar AUTHORS<br \/>\n    dd if=\/dev\/zero seek=16G bs=1 count=0 of=suffix.tar<br \/>\n    echo suffix.tar | cpio -H tar -o | tar tvf \u2014<\/p>\n<p>    -rw-r--r-- 1000\/1000       0 2019-08-30 16:40 suffix.tar<br \/>\n    -rw-r--r-- thomas\/thomas 161 2019-08-30 16:40 AUTHORS<\/p>\n<\/ul>\n<p>Al\u00e9m disso, na biblioteca <noindex><a rel=\"nofollow\" href=\"https:\/\/www.libarchive.org\/\">Libarchive<\/a><\/noindex>, que fornece ferramentas para trabalhar com v\u00e1rios formatos de arquivos comprimidos e arquivados, <noindex><a rel=\"nofollow\" href=\"https:\/\/blog.firosolutions.com\/exploits\/libarchi\">foi identificada<\/a><\/noindex> <noindex><a rel=\"nofollow\" href=\"https:\/\/bugzilla.suse.com\/show_bug.cgi?id=CVE-2019-18408\">uma vulnerabilidade<\/a><\/noindex> (<noindex><a rel=\"nofollow\" href=\"https:\/\/security-tracker.debian.org\/tracker\/CVE-2019-18408\">CVE-2019-18408<\/a><\/noindex>), que leva a uma refer\u00eancia a um bloco de mem\u00f3ria j\u00e1 liberado (use-after-free) ao processar arquivos RAR formatados de maneira especial. O problema pode potencialmente levar \u00e0 execu\u00e7\u00e3o de c\u00f3digo malicioso, mas a possibilidade de explora\u00e7\u00e3o \u00e9 considerada baixa (n\u00edvel de severidade definido como 4.4 de 10, ou seja, o problema \u00e9 considerado n\u00e3o perigoso). O problema foi corrigido sem alarde <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libarchive\/libarchive\/commit\/b8592ecba2f9e451e1f5cb7ab6dcee8b8e7b3f60\">no lan\u00e7amento<\/a><\/noindex> Lan\u00e7amento do Chrome OS 78 com suporte para desktops virtuais <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/libarchive\/libarchive\/releases\/tag\/v3.4.0\">3.4.0<\/a><\/noindex>.<\/p>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Fonte: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51820\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0421\u043f\u0443\u0441\u0442\u044f \u0447\u0435\u0442\u044b\u0440\u0435 \u0433\u043e\u0434\u0430 \u0441 \u043c\u043e\u043c\u0435\u043d\u0442\u0430 \u043f\u0440\u043e\u0448\u043b\u043e\u0433\u043e \u0432\u044b\u043f\u0443\u0441\u043a\u0430 \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0440\u0435\u043b\u0438\u0437 \u0443\u0442\u0438\u043b\u0438\u0442\u044b \u0434\u043b\u044f \u0430\u0440\u0445\u0438\u0432\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0444\u0430\u0439\u043b\u043e\u0432 cpio 2.13, \u043f\u0440\u0438\u043c\u0435\u043d\u044f\u0435\u043c\u043e\u0439 \u0432 \u043f\u0430\u043a\u0435\u0442\u0430\u0445 RPM \u0438 \u0432 initramfs. \u0412 \u043d\u043e\u0432\u043e\u043c \u0432\u044b\u043f\u0443\u0441\u043a\u0435 \u0443\u0441\u0442\u0440\u0430\u043d\u0435\u043d\u044b \u0442\u0440\u0438 \u0443\u044f\u0437\u0432\u0438\u043c\u043e\u0441\u0442\u0438: CVE-2015-1197 &#8212; \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u0435\u0442 \u043f\u0435\u0440\u0435\u0437\u0430\u043f\u0438\u0441\u0430\u0442\u044c \u0444\u0430\u0439\u043b\u044b \u0437\u0430 \u043f\u0440\u0435\u0434\u0435\u043b\u0430\u043c\u0438 \u043a\u0430\u0442\u0430\u043b\u043e\u0433\u0430, \u0432 \u043a\u043e\u0442\u043e\u0440\u044b\u0439 \u0440\u0430\u0441\u043a\u0440\u044b\u0432\u0430\u0435\u0442\u0441\u044f \u0430\u0440\u0445\u0438\u0432. CVE-2016-2037 &#8212; \u043f\u0440\u0438\u0432\u043e\u0434\u0438\u0442 \u043a \u0437\u0430\u043f\u0438\u0441\u0438 \u0432 \u043e\u0431\u043b\u0430\u0441\u0442\u044c \u0432\u043d\u0435 \u0432\u044b\u0434\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0431\u0443\u0444\u0435\u0440\u0430 \u043f\u0440\u0438 \u043e\u0431\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e \u043e\u0444\u043e\u0440\u043c\u043b\u0435\u043d\u043d\u044b\u0445 \u0444\u0430\u0439\u043b\u043e\u0432 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-52355","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta 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